一个天平，砝码分别为1g、3g、9g、27g、6561g，每个砝码只有一个，要称重的物品放在天平的左侧，而砝码允许放在天平的左右两侧。已知一个物品的重量，问如何称重？试编程解决。-A balance, weights were 1g, 3g, 9g, 27g, 6561g, each weight is only one item on the scale to weigh the left, while the weight allowed on both sides of the balance. Known weight of an item, ask how Weighting? Test programming solutions.